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Zhu X, Cheng K, Ding Y, Liu H, Xie S, Cao Y, Yue W. Magnetically controlled graphene field-effect transistor biosensor for highly sensitive detection of cardiac troponin I. DISCOVER NANO 2023; 18:106. [PMID: 37642818 PMCID: PMC10465447 DOI: 10.1186/s11671-023-03886-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 08/09/2023] [Indexed: 08/31/2023]
Abstract
Herein, we have constructed a magnetic graphene field-effect transistor biosensor (MGFETs) for highly sensitive detection of cardiac troponin I (CTNI). Graphene films transferred to ITO conductive glass as conductive channels. CTNI aptamer was immobilized onto the graphene film via 1-pyrene-butanoic acid succinimidyl ester (PBASE) to capture CTNI. Magnetic nanobeads (MBs) modified with CTNI antibody were added to the reaction chamber to form an aptamer/CTNI/antibody/magnetic nanobeads sandwich-type complex. We found that the magnetic force exerted on the complex leads to an impedance change of the graphene film. The reason for this result is that the magnetic field exerts an influence on the MBs, causing CTNI aptamer strand to bend, resulting in a change in the distance between the double conductive layers of the graphene film surface and the test solution. With periodic sampling integration, different concentrations of CTNI can be detected with high sensitivity. Due to the stringent recognition capability and high affinity between the CTNI aptamer and CTNI, MGFETs have the potential to detect various types of proteins. Furthermore, MGFETs also have the potential to be utilized for the detection of DNA or specific cells in the future.
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Affiliation(s)
- Xiaofeng Zhu
- Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China
| | - Kangning Cheng
- Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China
| | - Yue Ding
- Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China
| | - Huanqing Liu
- Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China
| | - Shuqi Xie
- Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China
| | - Yuwei Cao
- Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China
| | - Weiwei Yue
- Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China.
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Birnbaum Y, Nikus K, Atar D, Jneid H. Is RBBB the new LBBB? Are we going to repeat the same mistakes? J Electrocardiol 2021; 65:34-36. [PMID: 33477070 DOI: 10.1016/j.jelectrocard.2020.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 10/22/2022]
Affiliation(s)
- Yochai Birnbaum
- The Section of Cardiology, The Department of Medicine, Baylor College of Medicine, Houston, TX, United States of America.
| | - Kjell Nikus
- Heart Center, Tampere University, Hospital and Faculty of Medicine, Finland; Faculty of Medicine, Tampere University, Finland
| | - Dan Atar
- Dept. of Cardiology, Oslo University Hospital Ulleval, Oslo, Norway; Institute of Clinical Sciences, Norway
| | - Hani Jneid
- The Section of Cardiology, The Department of Medicine, Baylor College of Medicine, Houston, TX, United States of America
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